The educational speakers were fabulous, especially loved Milos who was exceptionally entertaining as well as educational. As we went through the locks, our expert educator was able to provide a running commentary that was informative and comprehensive. Our dinner staff, Kadek and Mario, were wonderful. Request something one time, and they attended to that request every evening. My room attendant, Yuris, was so attentive. I was disappointed in what seemed to be an excessive number of seminars attempting to sell jewelry, liquor, etc. on the ship. (The seminar on emeralds was excellent, as well as some tips for sightseeing there at the dock.) The guides for the Antigua, kayaking and horseback riding excursions (Guatemala, Colon and Puerto Vallarta) spoke excellent and understandable English and provided us with unexpected and delightful experiences. Alejandro, Nacho and Jeannie were superb at their jobs! I continue to be a big fan of Celebrity Cruises!